Hmm, I've symlinked the gtk-4.0 folder to catppuccin, but some apps like Nautilus don't seem to get themed (not even sure if it uses libadwaita though). Some others do work.
Yes, I totally agree with you! I didn't yet add screenshots to the README since some parts of the app are still matter to be changed in the near future. The development started actually just four days ago, so there's still room for UI improvements. I'll make sure to add screenshots to the README once it's more mature.
Yes, likely. I have never published an app there before so it'll be kinda interesting to get it working, but I guess that'll be fine (I'll probably try it in two weeks or so). I'll also try to add it to Void Linux's repos once it's stable, hope we'll get accepted there too